WB LS-DYNA angle-de...
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WB LS-DYNA angle-dependent pressure


New Member
Joined: 2 weeks ago
Posts: 1
Topic starter  

Hi guys,

I'm new to WB LS-DYNA and currently struggling to define a pressure with keyword commands.

The model is a hollow sphere made of shell elements. The pressure should be acting on one half of the sphere, but not perpendicular to each node. If the pressure is coming from the z-direction, it's maximum is where it hits the sphere perpendicular at the 0,0,+z coordinate. Depending on the angle starting at the maximum pressure point, the pressure is supposed to decline as a function of the cosinus of the given angle to the maximum pressure point. I hope you get what I'm trying to explain. 

My question now is: How can I generate a function, which takes the angle, with which the pressure hits the sphere, into consideration? Is there a possibility to define a cylindrical coordinate system?

Thanks for your help!


Negative Volume
Senior Member Admin
Joined: 2 years ago
Posts: 445

Hi @tobiwsbchr

I didn't want to leave this untouched, but this is a great question and one that I don't know how to answer. I'll see if I can find anything on it to help you out though but I can't promise anything. Maybe someone else can help if they have any experience. 

Joined: 1 month ago
Posts: 15

Check this link out and the compressed archive suggested at the bottom of the link. Often times, I end up having to fix the input deck for the DOF column using VIM's column editing feature.